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Erasing a file or entire disk when using a SSD.

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#1 Warthog-Fan


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Posted 28 June 2017 - 02:58 PM



A while back, I asked a question about defragging a SSD. I was told that I should not try to use the Windows Defrag tool because a SSD could be damaged by it because of the architecture of the SSDs internal workings.


This leads me to ask about using a program like Eraser which erases files, or an entire disk, by overwriting the data tracks several times. But since the SSD doesn't have tracks, I'm wondering if a Program like Eraser will work on the SSD or might even cause problems.


Is just deleting a file sufficient to make it inaccessible to someone trying to re-access the file in the future? And what about trying to retrieve a file that was deleted accidentally? In other words, when a file is deleted from a SSD, is it really gone forever?

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#2 jwoods301


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Posted 28 June 2017 - 03:03 PM

If TRIM is enabled on the SSD, the files are deleted permanently.



Edited by jwoods301, 28 June 2017 - 03:04 PM.

#3 JohnC_21


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Posted 28 June 2017 - 03:14 PM



Defragging doesn't damage the SSD but it can shorten it's life because of the writes which a SSD only has a certain amount of. By erasing the SSD you are writing to the drive and in the process shortening it's life but it will not damage it.



#4 Orange Blossom

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Posted 28 June 2017 - 04:06 PM

Hello Warthog-Fan,


I did some research on this very issue some time ago.  Note that defragging an SSD doesn't make any sense as an SSD functions very differently from a hard-drive.


Rather than overwriting the drive, the drive is purged, generally with an electrical pulse of some sort.  For more complete information, please read the 2nd half of this article: http://www.zdnet.com/article/how-to-securely-erase-hard-drives-hdds-and-solid-state-drives-ssds/ and also here: https://www.kingston.com/us/community/articledetail?ArticleId=10


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